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The Leaching of Hematite in Acid Solutions
Metallurgical Transactions B, 1985The reactions of hematite in aqueous hydrochloric acid, perchloric acid, and sulfuric acid solutions with or without the addition of common or uncommon salts were studied using monosized particulates in a well-stirred reactor and dilute solid concentration to obtain fundamental details of the reaction kinetics.
Hiroshi Majima +2 more
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Basalt leaching with orthophosphoric acid
Inorganic Materials, 2009Basalt leaching with orthophosphoric acid is studied by the method of isothermal dissolution. The total degree of dissolution of basalt and degrees of extraction into solution of separate elements as a function of temperature (20, 100°C), acid concentration (5–40%), and liquid-to-solid ratio are determined.
N. P. Dergacheva +3 more
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Aluminium Leaching by Heterotrophic Microorganism Aspergillus niger: An Acidic Leaching?
Arabian Journal for Science and Engineering, 2017Bioleaching of aluminium mineral boehmite by filamentous fungus Aspergillus niger was compared to chemical leaching by citric, oxalic and hydrochloric acids to evaluate the significance of A. niger’s metabolites on aluminium mobilization from this natural component of the aluminium ore.
Martin Urík +6 more
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Kinetics of Leaching Silicon from the Acid Leaching Residue of Pyrolusite
Advanced Materials Research, 2013The content of SiO2 was more than 60% in the residue of pyrolusite detached manganese by reduction roasted and acid leached, and it was a better siliceous raw material because of less other impurities. Through leaching silicon process in the residue of pyrolusite with alkali at atmospheric pressure, leaching kinetics of silica in the sodium hydroxide ...
Hai Feng Su +4 more
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Leaching of kaolin iron-oxides with organic acids
Journal of Chemical Technology & Biotechnology, 1997Bleaching of kaolin with a high content of iron oxides by means of three organic acids (citric, gluconic and oxalic) was studied. The first two release small quantities of iron oxides from the kaolin, which means they will not be adequate for large-scale processes.
Claudio Cameselle +2 more
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Leaching of heavy metals in acid mine drainage
Waste Management & Research: The Journal for a Sustainable Circular Economy, 2006Acid mine drainage is one of the most serious environmental problems that the coal and metal mining industry is currently facing. The generation of low pH drainage enhances the dissolution of heavy metals in water. The samples used in this research originated from three pits at mine dumps.
Lana, Saria +2 more
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2014 International Conference on Humanoid, Nanotechnology, Information Technology, Communication and Control, Environment and Management (HNICEM), 2014
This study aims to leach chromium from coal fly ash using citric acid, oxalic acid and gluconic acid. Fly ash obtained from coal ash pond comprises of 28 ppm chromium. After the batch leaching procedure, the results show that 27.66% of chromium was leached using 0.3 M citric acid with the contact time of 8 hours.
Denvert Pangayao, Susan Gallardo
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This study aims to leach chromium from coal fly ash using citric acid, oxalic acid and gluconic acid. Fly ash obtained from coal ash pond comprises of 28 ppm chromium. After the batch leaching procedure, the results show that 27.66% of chromium was leached using 0.3 M citric acid with the contact time of 8 hours.
Denvert Pangayao, Susan Gallardo
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Uranium leaching using citric acid and oxalic acid
Journal of Radioanalytical and Nuclear Chemistry, 2019Citric acid and oxalic acid, the main metabolites of fungi, have different leaching effects on uranium ore. Herein, uranium leaching from a volcano-litho-type uranium ore using citric acid and oxalic acid was studied by performing soaking experiments in incubator shakers using pure water and H2SO4 as controls.
Lingling Xu +3 more
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Acid Leach Of Uranium Ore: In Situ Conditions
SPE Annual Technical Conference and Exhibition, 1979Abstract Core samples from a property in Wyoming were tested for amenability to in situ leaching by acid ferric sulfate. In tests, about 95% recovery of the uranium was achieved. The ore is fortunately low in carbonate, and sulfuric acid consumption of 15#/T is expected using feed solutions of pH 1.8.
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Leaching kinetics of scheelite with nitric acid and phosphoric acid
International Journal of Refractory Metals and Hard Materials, 2015Abstract The extraction of tungsten from scheelite concentrate using phosphoric acid as chelating agent in nitric acid solutions was investigated. The effects of the leaching parameters, such as stirring speed, temperature, concentrations of HNO 3 and H 3 PO 4 as well as particle size were examined in order to model the kinetics of scheelite ...
Wenjuan Zhang +2 more
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